refactor(schema): extract public event definitions (#33579)

packages/opencode/src/session/message-v2.ts

@@ -1,5 +1,4 @@
-import { EventV2 } from "@opencode-ai/core/event"
-import { SessionID, MessageID, PartID } from "./schema"
+import { SessionID, MessageID } from "./schema"
 import { SessionV1 } from "@opencode-ai/core/v1/session"
 import { ProviderV2 } from "@opencode-ai/core/provider"
 import {
@@ -12,11 +11,9 @@ import {
   Info,
   OutputLengthError,
   Part,
-  StructuredOutputError,
   SubtaskPart,
   User,
   WithParts,
-  type ToolPart,
 } from "@opencode-ai/core/v1/session"
 
 import { NamedError } from "@opencode-ai/core/util/error"
@@ -61,16 +58,7 @@ export const Event = {
   Updated: SessionV1.Event.MessageUpdated,
   Removed: SessionV1.Event.MessageRemoved,
   PartUpdated: SessionV1.Event.PartUpdated,
-  PartDelta: EventV2.define({
-    type: "message.part.delta",
-    schema: {
-      sessionID: SessionID,
-      messageID: MessageID,
-      partID: PartID,
-      field: Schema.String,
-      delta: Schema.String,
-    },
-  }),
+  PartDelta: SessionV1.Event.PartDelta,
   PartRemoved: SessionV1.Event.PartRemoved,
 }